sunbird writes "As previously covered on Slashdot, on April 18th the FBI seized a server located in a New York colocation facility shared by May First / People Link and Riseup.net. The server, which was operated by the European Counter Network ('ECN'), the oldest independent internet service provider in Europe, was seized in relation to bomb threats sent to the University of Pittsburgh using a Mixmaster anonymous remailer hosted on the server (search warrant). The FBI's action has been criticized by the EFF. Predictably, the threats continued even after the server seizure. On April 24th, the FBI quietly returned the server, without notifying either Mayfirst / People Link or riseup, and were caught on video doing it."